feat: 初始化高校人事请假考勤技能 (process-leave-attendance-default)

基于 skill-template 脚手架开发，包含：
- 5 张业务表（教职工、请假政策、考勤日历、请假记录、假期余额）
- 请假核算引擎（扣薪计算、审批层级判定、年假抵扣）
- CLI 入口（import-employees / calculate-leave / render-html）
- HTML 审批与扣薪报告生成
- 示例数据与完整测试套件（295 tests passed）

tests/test_html_page_service.py

@@ -0,0 +1,75 @@
+# -*- coding: utf-8 -*-
+"""HTML 报告页薄写入 helper。"""
+
+from __future__ import annotations
+
+import os
+import unittest
+
+from _support import IsolatedDataRoot
+
+from service.html_page_service import (
+    HOST_HTML_RENDER_ACTION_ID,
+    load_html_template,
+    render_html_placeholders,
+    write_html_page,
+)
+
+
+class TestHtmlPageService(unittest.TestCase):
+    def test_host_action_id_is_stable(self) -> None:
+        self.assertEqual(HOST_HTML_RENDER_ACTION_ID, "render-html")
+
+    def test_write_html_page_atomic_under_html_dir(self) -> None:
+        with IsolatedDataRoot() as tmp:
+            path = write_html_page(
+                "example-report.html",
+                "<!DOCTYPE html><html><head><title>示例</title></head><body>ok</body></html>",
+            )
+            self.assertTrue(os.path.isfile(path))
+            norm = path.replace("\\", "/")
+            self.assertIn("/html/example-report.html", norm)
+            self.assertTrue(os.path.normcase(os.path.normpath(path)).startswith(
+                os.path.normcase(os.path.normpath(tmp)),
+            ))
+            self.assertFalse(os.path.isfile(path + ".tmp"))
+            with open(path, encoding="utf-8") as f:
+                self.assertIn("<title>示例</title>", f.read())
+
+    def test_load_and_fill_example_template(self) -> None:
+        with IsolatedDataRoot():
+            template = load_html_template("assets/html/example-report.html")
+            page = render_html_placeholders(
+                template,
+                {
+                    "TITLE": "示例报告",
+                    "GENERATED_AT": "2026-08-14 15:49:00",
+                    "BODY": "<p>hello</p>",
+                },
+            )
+            self.assertIn("<title>示例报告</title>", page)
+            self.assertIn("报告生成于 · 2026-08-14 15:49:00", page)
+            self.assertIn("<p>hello</p>", page)
+            self.assertNotIn("{{TITLE}}", page)
+            dest = write_html_page("example-report.html", page)
+            self.assertTrue(os.path.isfile(dest))
+
+    def test_rejects_unsafe_filename(self) -> None:
+        with IsolatedDataRoot():
+            with self.assertRaises(ValueError):
+                write_html_page("../x.html", "<html></html>")
+            with self.assertRaises(ValueError):
+                write_html_page("note.txt", "<html></html>")
+
+    def test_example_report_shell_embedded_preview_layout(self) -> None:
+        """守护 example-report.html：数据管理 iframe 预览布局基线不退化。"""
+        template = load_html_template("assets/html/example-report.html")
+        self.assertIn("overflow-x: hidden", template)
+        self.assertIn("min-width: 0", template)
+        self.assertIn("table-layout: fixed", template)
+        self.assertIn("overflow-wrap: anywhere", template)
+        self.assertNotIn("max-width:", template)
+
+
+if __name__ == "__main__":
+    unittest.main()